<?xml version="1.0" encoding="utf-8"?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"

    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

  <head>
    
    <style type="text/css">
      h1 {color:chartreuse;}
      p.first {color:red;}
      p.second {color:blue;}
    </style>

  </head>

  <body>

    <h1> Hello World Page</h1>

<p class="first">This is a simple Hello world page, but with different CSS, it still can appear differently.</p>

<p class="second">This Hello World is in blue.</p>

  </body>

</html>
